Dart Machinery, LTD. stands behind each product we manufacture 100%. Each component undergoes a detailed manufacturing process that involves the hundreds of calculated and precision steps to ensure the finest quality possible.

Warning This product contains chemicals known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov
Pro1LS 12° 285cc CNC PortFinal

PRO1 LS 12° 285cc CNC

Categories: , , Tags: , , , ,


Dart’s new PRO1 LS 12° 285cc CNC Aluminum rectangle port cylinder head for GM LS7 Compatible small block V8 engines take performance to the next level. This full CNC ported cylinder head offers higher performance and more versatility than factory designs.

The 12° based high performance cylinder head has better airflow, more efficient combustion chambers and more user friendly features than production LS castings. The Dart PRO1 285cc cylinder head retains stock valve angles, stock valve locations and stock valve train mounting with dowel holes to make installation easy and durable.

Heads are sold individually.

Open Up The Airways With Dart’s New PRO1 LS7-Compatible Heads


Material: RMR Cast

Aluminum Alloy

Valve angle: 12°

Intake port volume: 285cc CNC

Intake valve: 2.200”

Exhaust valve: 1.625”

Chamber Volume: 66cc

Part No.     Configuration for use Valves Max. Lift

11060000     C-Core Casting N/A N/A

11061080     Bare head (Dart Rocker Bar Machining) 2.200” / 1.625” N/A          

11061080J     Bare head (Jesel Rocker Bar Machining) 2.200” / 1.625” N/A

11061182     1.290” Beehive springs for Hydraulic roller 2.200” / 1.625” .625”

11061183     1.295” Dual springs for Hydraulic roller 2.200” / 1.625” .650”

11061184     1.310” Dual springs for Solid roller 2.200” / 1.625” .650”

PRO1 LS 12° 285cc CNC – H70